Improvement in harrow-teeth



H. R. KINNEY;

I Harrow Teeth. I 0 No. 107,506. J Y Patented Sept. 20, 1070.

' N. PEIERS, FHDTO-LITHOGRAFHER. WQSHINGTON D. c. I

dished "gs-wa pane dhtfliw HENRY s. KINN'E'Y, or rosrsnonrmonio.

Letters Patent No. 107,506, dated September 20, 1870.

IMPROVEMENT IN HARROW-TEETH,

The Schedule referred to in these Letters Patent and making pas-to! the same.

I I, HENRY It. KmnnY, of Portsmouth, in the county of Scioto and State of Ohio, have invented an Improved Harrow-Tooth, of which the followingis a specification.

N ata're and Objects of the Invention.

My harrow-tooth is designed for penetrating the.

ground to cut the soil and buried-stubble, and'also for crushing the elods which lie upon the surface. For these purposes the end is cimeter-shaped, and the edge-is not so far prolongedv rearwardly, but that the point is directly employed inpenetrating the ground. The upper anterior port-ion; of the tooth is blunt, and is intended to crush the surface clods. Description of the Accompanying Drawing.

Figure 1 is a perspective view of a barrow furnished with my improved tooth.

Figure 2 isa side elevation of a single tooth.

Figure 3 is a front elevation'of a tooth.

General Description.

A is one of the teeth with which the harrow-fi'ame of usual construction is filled.

Its upper portion 0 fits into a mortise or bored hole ble-tree, or .the hook of the spreader-chains, is at Y taehed. r v

The tooth, or, perhaps more properly, the-colter A,

i is of a cimeter shape-more easily shown' than described, and suifieiently exhibited in fig. The edge 1 has a backward eurre,'bnt it is not so prolonged that its tangent, at any point, shall have a less angle than,

say, 30 with a base line. Were it prolonged beyond this limit, the edge wohld tend to iide upon, rather than draw against, the buried stubble, and the soil with'whieh itcame in contact. As'will be seen by reference to fig. 3, the eolter presents a positive point to penetrate the soil, and does not present its edge directly downward; it has the advantage of an obliquelypresented edge, giving what is termeda draw-cut, and the peneration is assisted by giving a sharp point to 'the lower termination'of the tooth.

The edge terminates at a point,-say, opposite to and the front part ofthe tooth, from this point up-v Witnesses: v soons'rns G szn,

R.LLOD,

GEO. 0. NEWMAN. 

